针对光面爆破和定向断裂控制爆破存在的问题，提出了护壁爆破系列新技术，对其分类、护壁装置、护壁原理作了详细介绍。单孔模型试验和巷道掘进实验结果表明，该技术有非常好的护壁效果。该技术的开发与应用，为边坡开挖和隧道掘进等工程的爆破提供了一条便捷的途径，具有广阔的应用前景。

Double-pipe protecting borehole wall balsting,a new control blasting technology, is put forward and defined, which aims at resolving the problems existing in conventional smooth blasting and directional fracture controlled blasting. The characteristics of the new blasting technology, matching sets and explosion mechanism are detailedly introduced in the paper.The results of experiment on single borehole model blasting and tunnel digging testing indicate that it has very good blasting effect. As a result of high speed photography, crannies are initiated and propagated and concrete medium are fractured in controlled direction. Invention and application of its technology provide an effective and convenient way to obtain good effect of slope excavation and trunnel driving. It shows a bright prospect of widespread applications.